📌 Bump mermaid from 11.8.1 to 11.9.0

Bumps [mermaid](https://github.com/mermaid-js/mermaid) from 11.8.1 to 11.9.0.
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Commits](https://github.com/mermaid-js/mermaid/compare/mermaid@11.8.1...mermaid@11.9.0)

---
updated-dependencies:
- dependency-name: mermaid
  dependency-version: 11.9.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -45,7 +45,7 @@
     "katex": "^0.16.22",
     "lite-youtube-embed": "^0.3.3",
     "medium-zoom": "^1.1.0",
-    "mermaid": "^11.8.1",
+    "mermaid": "^11.9.0",
     "packery": "^3.0.0",
     "prettier": "^3.6.2",
     "prettier-plugin-go-template": "^0.0.15",